| Step | Hyp | Ref
| Expression |
| 1 | | pm3.24 408 |
. . . . 5
⊢ ¬
(𝑣 ∈ 𝑀 ∧ ¬ 𝑣 ∈ 𝑀) |
| 2 | | ancom 466 |
. . . . 5
⊢ ((𝑣 ∈ 𝑀 ∧ ¬ 𝑣 ∈ 𝑀) ↔ (¬ 𝑣 ∈ 𝑀 ∧ 𝑣 ∈ 𝑀)) |
| 3 | 1, 2 | mtbi 325 |
. . . 4
⊢ ¬
(¬ 𝑣 ∈ 𝑀 ∧ 𝑣 ∈ 𝑀) |
| 4 | 3 | nex 1833 |
. . 3
⊢ ¬
∃𝑣(¬ 𝑣 ∈ 𝑀 ∧ 𝑣 ∈ 𝑀) |
| 5 | | pm2.24 125 |
. . . . . . . . . . . . 13
⊢ (𝑀 ∈ 𝑉 → (¬ 𝑀 ∈ 𝑉 → ¬ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 6 | | idd 25 |
. . . . . . . . . . . . 13
⊢ (𝑀 ∈ 𝑉 → (¬ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) → ¬ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 7 | | snexg 5402 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑀 ∈ 𝑉 → {𝑀} ∈ V) |
| 8 | | snidg 4621 |
. . . . . . . . . . . . . . . . . 18
⊢ (𝑀 ∈ 𝑉 → 𝑀 ∈ {𝑀}) |
| 9 | | eleq1 2852 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (𝑥 = 𝑀 → (𝑥 ∈ 𝑦 ↔ 𝑀 ∈ 𝑦)) |
| 10 | 9 | imbi1d 344 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (𝑥 = 𝑀 → ((𝑥 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ (𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 11 | 10 | albidv 1955 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑥 = 𝑀 → (∀𝑦(𝑥 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 12 | | mirimanofffr.1 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ 𝑀 = {𝑥 ∈ 𝑉 ∣ ∀𝑦(𝑥 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)} |
| 13 | 11, 12 | elrab2 3652 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑀 ∈ 𝑀 ↔ (𝑀 ∈ 𝑉 ∧ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 14 | 13 | simprbi 503 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑀 ∈ 𝑀 → ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) |
| 15 | | eleq2 2853 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑦 = {𝑀} → (𝑀 ∈ 𝑦 ↔ 𝑀 ∈ {𝑀})) |
| 16 | | ineq2 4114 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (𝑦 = {𝑀} → (𝑧 ∩ 𝑦) = (𝑧 ∩ {𝑀})) |
| 17 | 16 | eqeq1d 2765 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (𝑦 = {𝑀} → ((𝑧 ∩ 𝑦) = ∅ ↔ (𝑧 ∩ {𝑀}) = ∅)) |
| 18 | 17 | rexeqbi1dv 3334 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑦 = {𝑀} → (∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅ ↔ ∃𝑧 ∈ {𝑀} (𝑧 ∩ {𝑀}) = ∅)) |
| 19 | 15, 18 | imbi12d 347 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑦 = {𝑀} → ((𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ (𝑀 ∈ {𝑀} → ∃𝑧 ∈ {𝑀} (𝑧 ∩ {𝑀}) = ∅))) |
| 20 | 19 | spcgv 3554 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ({𝑀} ∈ V → (∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) → (𝑀 ∈ {𝑀} → ∃𝑧 ∈ {𝑀} (𝑧 ∩ {𝑀}) = ∅))) |
| 21 | 14, 20 | syl5 35 |
. . . . . . . . . . . . . . . . . . 19
⊢ ({𝑀} ∈ V → (𝑀 ∈ 𝑀 → (𝑀 ∈ {𝑀} → ∃𝑧 ∈ {𝑀} (𝑧 ∩ {𝑀}) = ∅))) |
| 22 | 21 | com23 87 |
. . . . . . . . . . . . . . . . . 18
⊢ ({𝑀} ∈ V → (𝑀 ∈ {𝑀} → (𝑀 ∈ 𝑀 → ∃𝑧 ∈ {𝑀} (𝑧 ∩ {𝑀}) = ∅))) |
| 23 | 7, 8, 22 | sylc 66 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑀 ∈ 𝑉 → (𝑀 ∈ 𝑀 → ∃𝑧 ∈ {𝑀} (𝑧 ∩ {𝑀}) = ∅)) |
| 24 | | elsn2g 4625 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑀 ∈ 𝑉 → (𝑧 ∈ {𝑀} ↔ 𝑧 = 𝑀)) |
| 25 | | ineq1 4113 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (𝑧 = 𝑀 → (𝑧 ∩ {𝑀}) = (𝑀 ∩ {𝑀})) |
| 26 | 25 | eqeq1d 2765 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑧 = 𝑀 → ((𝑧 ∩ {𝑀}) = ∅ ↔ (𝑀 ∩ {𝑀}) = ∅)) |
| 27 | 24, 26 | biimtrdi 256 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑀 ∈ 𝑉 → (𝑧 ∈ {𝑀} → ((𝑧 ∩ {𝑀}) = ∅ ↔ (𝑀 ∩ {𝑀}) = ∅))) |
| 28 | 27 | imp 412 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((𝑀 ∈ 𝑉 ∧ 𝑧 ∈ {𝑀}) → ((𝑧 ∩ {𝑀}) = ∅ ↔ (𝑀 ∩ {𝑀}) = ∅)) |
| 29 | | disjr 4407 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((𝑀 ∩ {𝑀}) = ∅ ↔ ∀𝑤 ∈ {𝑀} ¬ 𝑤 ∈ 𝑀) |
| 30 | 28, 29 | bitrdi 290 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((𝑀 ∈ 𝑉 ∧ 𝑧 ∈ {𝑀}) → ((𝑧 ∩ {𝑀}) = ∅ ↔ ∀𝑤 ∈ {𝑀} ¬ 𝑤 ∈ 𝑀)) |
| 31 | | eleq1 2852 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (𝑤 = 𝑀 → (𝑤 ∈ 𝑀 ↔ 𝑀 ∈ 𝑀)) |
| 32 | 31 | notbid 321 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (𝑤 = 𝑀 → (¬ 𝑤 ∈ 𝑀 ↔ ¬ 𝑀 ∈ 𝑀)) |
| 33 | 32 | rspcv 3576 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (𝑀 ∈ {𝑀} → (∀𝑤 ∈ {𝑀} ¬ 𝑤 ∈ 𝑀 → ¬ 𝑀 ∈ 𝑀)) |
| 34 | 8, 33 | syl 18 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑀 ∈ 𝑉 → (∀𝑤 ∈ {𝑀} ¬ 𝑤 ∈ 𝑀 → ¬ 𝑀 ∈ 𝑀)) |
| 35 | 34 | adantr 486 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((𝑀 ∈ 𝑉 ∧ 𝑧 ∈ {𝑀}) → (∀𝑤 ∈ {𝑀} ¬ 𝑤 ∈ 𝑀 → ¬ 𝑀 ∈ 𝑀)) |
| 36 | 30, 35 | sylbid 243 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝑀 ∈ 𝑉 ∧ 𝑧 ∈ {𝑀}) → ((𝑧 ∩ {𝑀}) = ∅ → ¬ 𝑀 ∈ 𝑀)) |
| 37 | 36 | rexlimdva 3167 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑀 ∈ 𝑉 → (∃𝑧 ∈ {𝑀} (𝑧 ∩ {𝑀}) = ∅ → ¬ 𝑀 ∈ 𝑀)) |
| 38 | 23, 37 | syld 48 |
. . . . . . . . . . . . . . . 16
⊢ (𝑀 ∈ 𝑉 → (𝑀 ∈ 𝑀 → ¬ 𝑀 ∈ 𝑀)) |
| 39 | 38 | pm2.01d 192 |
. . . . . . . . . . . . . . 15
⊢ (𝑀 ∈ 𝑉 → ¬ 𝑀 ∈ 𝑀) |
| 40 | 13 | notbii 323 |
. . . . . . . . . . . . . . 15
⊢ (¬
𝑀 ∈ 𝑀 ↔ ¬ (𝑀 ∈ 𝑉 ∧ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 41 | 39, 40 | sylib 221 |
. . . . . . . . . . . . . 14
⊢ (𝑀 ∈ 𝑉 → ¬ (𝑀 ∈ 𝑉 ∧ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 42 | | ianor 997 |
. . . . . . . . . . . . . 14
⊢ (¬
(𝑀 ∈ 𝑉 ∧ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) ↔ (¬ 𝑀 ∈ 𝑉 ∨ ¬ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 43 | 41, 42 | sylib 221 |
. . . . . . . . . . . . 13
⊢ (𝑀 ∈ 𝑉 → (¬ 𝑀 ∈ 𝑉 ∨ ¬ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 44 | 5, 6, 43 | mpjaod 874 |
. . . . . . . . . . . 12
⊢ (𝑀 ∈ 𝑉 → ¬ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) |
| 45 | | exanali 1892 |
. . . . . . . . . . . 12
⊢
(∃𝑦(𝑀 ∈ 𝑦 ∧ ¬ ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ¬ ∀𝑦(𝑀 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) |
| 46 | 44, 45 | sylibr 237 |
. . . . . . . . . . 11
⊢ (𝑀 ∈ 𝑉 → ∃𝑦(𝑀 ∈ 𝑦 ∧ ¬ ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) |
| 47 | | df-rex 3091 |
. . . . . . . . . . . . . . . 16
⊢
(∃𝑧 ∈
𝑦 (𝑧 ∩ 𝑦) = ∅ ↔ ∃𝑧(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅)) |
| 48 | 47 | notbii 323 |
. . . . . . . . . . . . . . 15
⊢ (¬
∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅ ↔ ¬ ∃𝑧(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅)) |
| 49 | | alnex 1814 |
. . . . . . . . . . . . . . 15
⊢
(∀𝑧 ¬
(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅) ↔ ¬ ∃𝑧(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅)) |
| 50 | | ianor 997 |
. . . . . . . . . . . . . . . . 17
⊢ (¬
(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅) ↔ (¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅)) |
| 51 | | imor 867 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅) ↔ (¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅)) |
| 52 | 50, 51 | bitr4i 281 |
. . . . . . . . . . . . . . . 16
⊢ (¬
(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅) ↔ (𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅)) |
| 53 | 52 | albii 1852 |
. . . . . . . . . . . . . . 15
⊢
(∀𝑧 ¬
(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅) ↔ ∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅)) |
| 54 | 48, 49, 53 | 3bitr2i 302 |
. . . . . . . . . . . . . 14
⊢ (¬
∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅ ↔ ∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅)) |
| 55 | | df-ral 3081 |
. . . . . . . . . . . . . 14
⊢
(∀𝑧 ∈
𝑦 ¬ (𝑧 ∩ 𝑦) = ∅ ↔ ∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅)) |
| 56 | | df-ral 3081 |
. . . . . . . . . . . . . . . . . . 19
⊢
(∀𝑤 ∈
𝑦 ¬ 𝑤 ∈ 𝑧 ↔ ∀𝑤(𝑤 ∈ 𝑦 → ¬ 𝑤 ∈ 𝑧)) |
| 57 | 56 | notbii 323 |
. . . . . . . . . . . . . . . . . 18
⊢ (¬
∀𝑤 ∈ 𝑦 ¬ 𝑤 ∈ 𝑧 ↔ ¬ ∀𝑤(𝑤 ∈ 𝑦 → ¬ 𝑤 ∈ 𝑧)) |
| 58 | | disjr 4407 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝑧 ∩ 𝑦) = ∅ ↔ ∀𝑤 ∈ 𝑦 ¬ 𝑤 ∈ 𝑧) |
| 59 | 57, 58 | xchnxbir 336 |
. . . . . . . . . . . . . . . . 17
⊢ (¬
(𝑧 ∩ 𝑦) = ∅ ↔ ¬ ∀𝑤(𝑤 ∈ 𝑦 → ¬ 𝑤 ∈ 𝑧)) |
| 60 | | exnal 1860 |
. . . . . . . . . . . . . . . . 17
⊢
(∃𝑤 ¬
(𝑤 ∈ 𝑦 → ¬ 𝑤 ∈ 𝑧) ↔ ¬ ∀𝑤(𝑤 ∈ 𝑦 → ¬ 𝑤 ∈ 𝑧)) |
| 61 | | pm4.63 403 |
. . . . . . . . . . . . . . . . . 18
⊢ (¬
(𝑤 ∈ 𝑦 → ¬ 𝑤 ∈ 𝑧) ↔ (𝑤 ∈ 𝑦 ∧ 𝑤 ∈ 𝑧)) |
| 62 | 61 | exbii 1881 |
. . . . . . . . . . . . . . . . 17
⊢
(∃𝑤 ¬
(𝑤 ∈ 𝑦 → ¬ 𝑤 ∈ 𝑧) ↔ ∃𝑤(𝑤 ∈ 𝑦 ∧ 𝑤 ∈ 𝑧)) |
| 63 | 59, 60, 62 | 3bitr2i 302 |
. . . . . . . . . . . . . . . 16
⊢ (¬
(𝑧 ∩ 𝑦) = ∅ ↔ ∃𝑤(𝑤 ∈ 𝑦 ∧ 𝑤 ∈ 𝑧)) |
| 64 | | df-rex 3091 |
. . . . . . . . . . . . . . . 16
⊢
(∃𝑤 ∈
𝑦 𝑤 ∈ 𝑧 ↔ ∃𝑤(𝑤 ∈ 𝑦 ∧ 𝑤 ∈ 𝑧)) |
| 65 | 63, 64 | bitr4i 281 |
. . . . . . . . . . . . . . 15
⊢ (¬
(𝑧 ∩ 𝑦) = ∅ ↔ ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) |
| 66 | 65 | ralbii 3112 |
. . . . . . . . . . . . . 14
⊢
(∀𝑧 ∈
𝑦 ¬ (𝑧 ∩ 𝑦) = ∅ ↔ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) |
| 67 | 54, 55, 66 | 3bitr2i 302 |
. . . . . . . . . . . . 13
⊢ (¬
∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅ ↔ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) |
| 68 | 67 | anbi2i 635 |
. . . . . . . . . . . 12
⊢ ((𝑀 ∈ 𝑦 ∧ ¬ ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ (𝑀 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 69 | 68 | exbii 1881 |
. . . . . . . . . . 11
⊢
(∃𝑦(𝑀 ∈ 𝑦 ∧ ¬ ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑀 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 70 | 46, 69 | sylib 221 |
. . . . . . . . . 10
⊢ (𝑀 ∈ 𝑉 → ∃𝑦(𝑀 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 71 | | eleq2w2 2759 |
. . . . . . . . . . . . . . 15
⊢ (𝑧 = 𝑀 → (𝑤 ∈ 𝑧 ↔ 𝑤 ∈ 𝑀)) |
| 72 | 71 | rexbidv 3190 |
. . . . . . . . . . . . . 14
⊢ (𝑧 = 𝑀 → (∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ↔ ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑀)) |
| 73 | 72 | rspcva 3578 |
. . . . . . . . . . . . 13
⊢ ((𝑀 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) → ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑀) |
| 74 | 73 | anim2i 629 |
. . . . . . . . . . . 12
⊢
((∀𝑧 ∈
𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ (𝑀 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) → (∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑀)) |
| 75 | 74 | anabss7 686 |
. . . . . . . . . . 11
⊢ ((𝑀 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) → (∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑀)) |
| 76 | 75 | eximi 1868 |
. . . . . . . . . 10
⊢
(∃𝑦(𝑀 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) → ∃𝑦(∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑀)) |
| 77 | 70, 76 | syl 18 |
. . . . . . . . 9
⊢ (𝑀 ∈ 𝑉 → ∃𝑦(∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑀)) |
| 78 | | eleq1w 2847 |
. . . . . . . . . . . 12
⊢ (𝑤 = 𝑣 → (𝑤 ∈ 𝑀 ↔ 𝑣 ∈ 𝑀)) |
| 79 | 78 | cbvrexvw 3245 |
. . . . . . . . . . 11
⊢
(∃𝑤 ∈
𝑦 𝑤 ∈ 𝑀 ↔ ∃𝑣 ∈ 𝑦 𝑣 ∈ 𝑀) |
| 80 | 79 | anbi2i 635 |
. . . . . . . . . 10
⊢
((∀𝑧 ∈
𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑀) ↔ (∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑣 ∈ 𝑦 𝑣 ∈ 𝑀)) |
| 81 | 80 | exbii 1881 |
. . . . . . . . 9
⊢
(∃𝑦(∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑀) ↔ ∃𝑦(∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑣 ∈ 𝑦 𝑣 ∈ 𝑀)) |
| 82 | 77, 81 | sylib 221 |
. . . . . . . 8
⊢ (𝑀 ∈ 𝑉 → ∃𝑦(∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑣 ∈ 𝑦 𝑣 ∈ 𝑀)) |
| 83 | | r19.41v 3196 |
. . . . . . . . . 10
⊢
(∃𝑣 ∈
𝑦 (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ (∃𝑣 ∈ 𝑦 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 84 | 83 | biancomi 468 |
. . . . . . . . 9
⊢
(∃𝑣 ∈
𝑦 (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ (∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑣 ∈ 𝑦 𝑣 ∈ 𝑀)) |
| 85 | 84 | exbii 1881 |
. . . . . . . 8
⊢
(∃𝑦∃𝑣 ∈ 𝑦 (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ ∃𝑦(∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ ∃𝑣 ∈ 𝑦 𝑣 ∈ 𝑀)) |
| 86 | 82, 85 | sylibr 237 |
. . . . . . 7
⊢ (𝑀 ∈ 𝑉 → ∃𝑦∃𝑣 ∈ 𝑦 (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 87 | | df-rex 3091 |
. . . . . . . . 9
⊢
(∃𝑣 ∈
𝑦 (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ ∃𝑣(𝑣 ∈ 𝑦 ∧ (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧))) |
| 88 | | 3anass 1111 |
. . . . . . . . . 10
⊢ ((𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ (𝑣 ∈ 𝑦 ∧ (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧))) |
| 89 | 88 | exbii 1881 |
. . . . . . . . 9
⊢
(∃𝑣(𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ ∃𝑣(𝑣 ∈ 𝑦 ∧ (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧))) |
| 90 | 87, 89 | bitr4i 281 |
. . . . . . . 8
⊢
(∃𝑣 ∈
𝑦 (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ ∃𝑣(𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 91 | 90 | exbii 1881 |
. . . . . . 7
⊢
(∃𝑦∃𝑣 ∈ 𝑦 (𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ ∃𝑦∃𝑣(𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 92 | 86, 91 | sylib 221 |
. . . . . 6
⊢ (𝑀 ∈ 𝑉 → ∃𝑦∃𝑣(𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 93 | | excom 2202 |
. . . . . 6
⊢
(∃𝑦∃𝑣(𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ ∃𝑣∃𝑦(𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 94 | 92, 93 | sylib 221 |
. . . . 5
⊢ (𝑀 ∈ 𝑉 → ∃𝑣∃𝑦(𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 95 | | 3ancomb 1116 |
. . . . . 6
⊢ ((𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ (𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ 𝑣 ∈ 𝑀)) |
| 96 | 95 | 2exbii 1882 |
. . . . 5
⊢
(∃𝑣∃𝑦(𝑣 ∈ 𝑦 ∧ 𝑣 ∈ 𝑀 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ↔ ∃𝑣∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ 𝑣 ∈ 𝑀)) |
| 97 | 94, 96 | sylib 221 |
. . . 4
⊢ (𝑀 ∈ 𝑉 → ∃𝑣∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ 𝑣 ∈ 𝑀)) |
| 98 | | df-3an 1105 |
. . . . . . 7
⊢ ((𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ 𝑣 ∈ 𝑀) ↔ ((𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ∧ 𝑣 ∈ 𝑀)) |
| 99 | 98 | exbii 1881 |
. . . . . 6
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ 𝑣 ∈ 𝑀) ↔ ∃𝑦((𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ∧ 𝑣 ∈ 𝑀)) |
| 100 | | 19.41v 1984 |
. . . . . . 7
⊢
(∃𝑦((𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ∧ 𝑣 ∈ 𝑀) ↔ (∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ∧ 𝑣 ∈ 𝑀)) |
| 101 | | pm4.61 410 |
. . . . . . . . . . . . . 14
⊢ (¬
(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ (𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) |
| 102 | 101 | exbii 1881 |
. . . . . . . . . . . . 13
⊢
(∃𝑦 ¬
(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) |
| 103 | | exnal 1860 |
. . . . . . . . . . . . 13
⊢
(∃𝑦 ¬
(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ¬ ∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) |
| 104 | 48 | anbi2i 635 |
. . . . . . . . . . . . . 14
⊢ ((𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ (𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅))) |
| 105 | 104 | exbii 1881 |
. . . . . . . . . . . . 13
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅))) |
| 106 | 102, 103,
105 | 3bitr3i 304 |
. . . . . . . . . . . 12
⊢ (¬
∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅))) |
| 107 | 49 | anbi2i 635 |
. . . . . . . . . . . . 13
⊢ ((𝑣 ∈ 𝑦 ∧ ∀𝑧 ¬ (𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅)) ↔ (𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅))) |
| 108 | 107 | exbii 1881 |
. . . . . . . . . . . 12
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ¬ (𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅)) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ¬ ∃𝑧(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅))) |
| 109 | 50 | albii 1852 |
. . . . . . . . . . . . . 14
⊢
(∀𝑧 ¬
(𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅) ↔ ∀𝑧(¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅)) |
| 110 | 109 | anbi2i 635 |
. . . . . . . . . . . . 13
⊢ ((𝑣 ∈ 𝑦 ∧ ∀𝑧 ¬ (𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅)) ↔ (𝑣 ∈ 𝑦 ∧ ∀𝑧(¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅))) |
| 111 | 110 | exbii 1881 |
. . . . . . . . . . . 12
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ¬ (𝑧 ∈ 𝑦 ∧ (𝑧 ∩ 𝑦) = ∅)) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧(¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅))) |
| 112 | 106, 108,
111 | 3bitr2i 302 |
. . . . . . . . . . 11
⊢ (¬
∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧(¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅))) |
| 113 | 51 | albii 1852 |
. . . . . . . . . . . . 13
⊢
(∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅) ↔ ∀𝑧(¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅)) |
| 114 | 113 | anbi2i 635 |
. . . . . . . . . . . 12
⊢ ((𝑣 ∈ 𝑦 ∧ ∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅)) ↔ (𝑣 ∈ 𝑦 ∧ ∀𝑧(¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅))) |
| 115 | 114 | exbii 1881 |
. . . . . . . . . . 11
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅)) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧(¬ 𝑧 ∈ 𝑦 ∨ ¬ (𝑧 ∩ 𝑦) = ∅))) |
| 116 | 112, 115 | bitr4i 281 |
. . . . . . . . . 10
⊢ (¬
∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅))) |
| 117 | 55 | anbi2i 635 |
. . . . . . . . . . 11
⊢ ((𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ¬ (𝑧 ∩ 𝑦) = ∅) ↔ (𝑣 ∈ 𝑦 ∧ ∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅))) |
| 118 | 117 | exbii 1881 |
. . . . . . . . . 10
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ¬ (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧(𝑧 ∈ 𝑦 → ¬ (𝑧 ∩ 𝑦) = ∅))) |
| 119 | 66 | anbi2i 635 |
. . . . . . . . . . 11
⊢ ((𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ¬ (𝑧 ∩ 𝑦) = ∅) ↔ (𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 120 | 119 | exbii 1881 |
. . . . . . . . . 10
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ¬ (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 121 | 116, 118,
120 | 3bitr2i 302 |
. . . . . . . . 9
⊢ (¬
∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧)) |
| 122 | | olc 882 |
. . . . . . . . . 10
⊢ (¬
∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) → (¬ 𝑣 ∈ 𝑉 ∨ ¬ ∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 123 | | ianor 997 |
. . . . . . . . . . 11
⊢ (¬
(𝑣 ∈ 𝑉 ∧ ∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅)) ↔ (¬ 𝑣 ∈ 𝑉 ∨ ¬ ∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 124 | | elequ1 2154 |
. . . . . . . . . . . . . 14
⊢ (𝑥 = 𝑣 → (𝑥 ∈ 𝑦 ↔ 𝑣 ∈ 𝑦)) |
| 125 | 124 | imbi1d 344 |
. . . . . . . . . . . . 13
⊢ (𝑥 = 𝑣 → ((𝑥 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ (𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 126 | 125 | albidv 1955 |
. . . . . . . . . . . 12
⊢ (𝑥 = 𝑣 → (∀𝑦(𝑥 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) ↔ ∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 127 | 126, 12 | elrab2 3652 |
. . . . . . . . . . 11
⊢ (𝑣 ∈ 𝑀 ↔ (𝑣 ∈ 𝑉 ∧ ∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 128 | 123, 127 | xchnxbir 336 |
. . . . . . . . . 10
⊢ (¬
𝑣 ∈ 𝑀 ↔ (¬ 𝑣 ∈ 𝑉 ∨ ¬ ∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅))) |
| 129 | 122, 128 | sylibr 237 |
. . . . . . . . 9
⊢ (¬
∀𝑦(𝑣 ∈ 𝑦 → ∃𝑧 ∈ 𝑦 (𝑧 ∩ 𝑦) = ∅) → ¬ 𝑣 ∈ 𝑀) |
| 130 | 121, 129 | sylbir 238 |
. . . . . . . 8
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) → ¬ 𝑣 ∈ 𝑀) |
| 131 | 130 | anim1i 627 |
. . . . . . 7
⊢
((∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ∧ 𝑣 ∈ 𝑀) → (¬ 𝑣 ∈ 𝑀 ∧ 𝑣 ∈ 𝑀)) |
| 132 | 100, 131 | sylbi 220 |
. . . . . 6
⊢
(∃𝑦((𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧) ∧ 𝑣 ∈ 𝑀) → (¬ 𝑣 ∈ 𝑀 ∧ 𝑣 ∈ 𝑀)) |
| 133 | 99, 132 | sylbi 220 |
. . . . 5
⊢
(∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ 𝑣 ∈ 𝑀) → (¬ 𝑣 ∈ 𝑀 ∧ 𝑣 ∈ 𝑀)) |
| 134 | 133 | eximi 1868 |
. . . 4
⊢
(∃𝑣∃𝑦(𝑣 ∈ 𝑦 ∧ ∀𝑧 ∈ 𝑦 ∃𝑤 ∈ 𝑦 𝑤 ∈ 𝑧 ∧ 𝑣 ∈ 𝑀) → ∃𝑣(¬ 𝑣 ∈ 𝑀 ∧ 𝑣 ∈ 𝑀)) |
| 135 | 97, 134 | syl 18 |
. . 3
⊢ (𝑀 ∈ 𝑉 → ∃𝑣(¬ 𝑣 ∈ 𝑀 ∧ 𝑣 ∈ 𝑀)) |
| 136 | 4, 135 | mto 200 |
. 2
⊢ ¬
𝑀 ∈ 𝑉 |
| 137 | 136 | nelir 3068 |
1
⊢ 𝑀 ∉ 𝑉 |